Valve



c. w. LAIIIIEII.-

VALVE.

APPLICATION FILED APII.29. Isls.

' Patented May 4, 192.0.

f FGJ. 9

W raww To all-whomt'may'concem Be litfknown that I, CHESTER a citizenl of 'the'4 United States, residing at Philadelphia, in the countyof Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Valves, of whichthe following is a'speeifi- Vso cation.

lThis invention relates to fluid pressure operated' plungers, and particularly to such" plunger'scarrying integrally a piston and a valve mating with a seat rigid withV the plunger' casing.

In such plungers 1t is often desirable to hold the valve tightly'to-its sea-t against unseating pressure on the valve face and' at the same time to prevent leakage of the f` holding pressure at the piston. v

A sufficiently tight packing of the ordinary kind between the plunger and the cylinder .walls `would seriously impede the movements of the plunger and due ,to strains and distortion of the parts and temperature variations in length, it is impossible inpractice to tightly seat both the valve and the piston simultaneously.'A

The object'ofthis invention is to provide a construction in which fthe plunger will be free to move in its cylinderand which will be tightly packed against leakage at extreme closed position. A further object of the invention is to provide seating means which will be self alining and held tight by the fluid pressure on the valve plunger and which lwill automatically accommodate itself to relative distortions of the mating parts and variations in the spacing of the parts from the main valve and valve seats, so that tight leakproof fitting is surely and simultaneously made and maintained 'at both the valve and the piston head.

Figure 1, is a View princlpally in longitudinal-section of a valve embodying my improvements.

Fig. 2, is a modification showing the use of a different packing.

In the drawings 5, represents a valve body or housingwhich may be an enlargement of a conduit or pipe line, 6, lindicates a fixed hollow .valve element and 7, is a complemental telescopic plunger for which, as is usual, an annular seat 8, is provided at the neck of the housing. Y

Plunger 7, is reduced in diameter throughout a portion of its length so as to form with the fixed element, an annular chamber 9,

Specification of Patent.

vvisinni:

-Plungel; 7 in combination with lfixed elcment` 6, also forms an inner chamber 10. Chambers 9 vand 10, which are used for the application of pressure to'move the plunger of control piping not shown. The numeral A11, indicates the main fluid or gas passage through the valve.

iVhen the pipe line is under pressure and plunger 7, is closed,'plunger 7 ,'is held closed by maintaining -pressure in chamber 10, and exhausting pressure .from chamber 9. If therefore it is desired to prevent leakage out of chamber Y9, through the control valve it isf necessary, to prevent leakage from chamber 10, into chamber 9. lAlso, since passage '11, is likewise under pressure -it is necessary to prevent leakage from passage 11, into chamber 9. Y

To tightly seal the chamber 9, the casing 6, is formed with shoulders 6a and 6b and the valve plun er 7 with coperating shoulders 7a and.7b. irect cooperation between these shoulders cannot in practice be attained duc to irregularities and variations in the parts Patented May 4, 1920. pplicaticn iler! April 29, 191,9.v Serial No. 293,477. I i

.7, may be subjected to either full pipe line pressure or atmospheric pressure by means the valve 7 and seatv 8, to. simultaneously make perfect fit at all points. In orderto form simultaneous leakproof seats at all the l valve and piston surfaces the valve 7 is permitted to accuratelyand tightly seat, and seat and sealing means is provided at the piston to yieldingly accommodate itself to varying relative positions of theishoulders 6, 6b, and 7a, 7", and so formed as to make a tight seal under the fluid pressure on the plunger, irrespective of the exact relative position of-fthe'parts. The shoulders 6a and 7b, are cut awayv at aand b,- respectively and a flexible metalring 12, Fig. 1, and a leather ring 13, are fastened to plunger 7, by means of a retaining rin 14. The supporting sur- Jface of plunger g?, comes in contact with only part of the yarea of iiexible ring l12,

thereby allowing the remainder or outer chamber 9. If leather ring 13, comes in conible ring 12, will spring backward and allowplunger 7, to complete its stroke,

`tact with seat 6", just before plunger 7, makes rigid Contact at valve seat 8, the' flexdisk 17, is fastened to head 16, by means 'of plate 18, and makes Contact with seat 19, in

i 1n plunger 7.

lA similar combination of flexible ring, leather ring and retaining ring is shown to ber 9.A In this case the flexible ring, leather ring and retaining ring are fastened to fixed. valve element 6, to make contact with aseat 7a, on plunger 7. Theoperation is the'same with the annular chamber between the as described above.V

Fig. 2, shows a modification and eliminates the use of leather or packing of a similar nature. A headI 16, is shown fastened rigidly to large end ofplunger 7. A fiexible fixed valve'element 6. The purpose of contact at seat 19', is to prevent leakage from chamber 10, tol chamber 9. l

Similarly a flexible' ri'ng20, isfastened to fixed valve-element 6, by means of retain ing ring 21, and makes contact with seat 22, The purpose ofcontact at seat 22, is to prevent leakage from passage y 11, to chamber 9; The operation of flexible disk 17, and flexible ring 20, is the same as that described for Fig. 1, except that a ground metal to metal contact is ldepended- Aupon at seats 19, and 22, to stop leakage inbination of fixed and movable valve parts flow through the valve and having inside the' valve body cylindrical and annular chambers between which there is established a difference of pressure for operating the valve,'opposed shoulders on the valve-parts shoulders, and spring rings projecting respectively from the fixed and movable valve parts and adapted to coperate `with said having between them a valve seat to'stop Y prevent leakage from passage 11, to chamy shoulders vindependently of the position of the valve parts as fixed by Contact at the valve seat.

2. In a valve of the type recited the cornbination of -lixed and movable valve parts having between them a -valve seat to stop flow through the-'valveand having inside of the valve bod-y cylindrical and Y annular chambers between which there is established a differenceof pressurel for operating the valve, opposed-shoulders on the valve parts with the annular chamber between thefshoulders, spring rings projecting respectively from the fixed and movable valve parts and adapted to coperate with said shoulders independently of the position of the valve parts as fixed by contact at the valve seat,

and packing interposed between' the shoulders and rings.

` CHESTER WYPLARNER. 

